#7 14.25" x 20" Poly Mailing Envelopes Padded Bubble Book Mailers Waterproof Self Adhesive Bag 50 Pieces 2.5 millimeter thickness, Recyclable: Yes. Water Resistant, Lightweight and Padded Interior. Color: White/Grey, Paper Liner: Clear with antistat. Lip Size: 1.5 +/- , Bubble Lining: 3/16. Usable Dimensions: 14.25" x 19", Outer Size: 15.25" x 19" + 1.57".